Nuno Pelágio focused on enhancing the rotation UI in the ppy/osu repository, addressing a nuanced bug related to angle normalization and wrapping at the 180-degree boundary. Using C# and applying strong mathematical reasoning, Nuno implemented symmetric normalization logic to ensure consistent and accurate angle display across all rotation points, resolving edge-case inconsistencies that previously led to asymmetric rendering. The solution improved user experience by delivering smoother and more predictable rotation interactions, particularly within the selection box component. Throughout the process, Nuno emphasized code maintainability and clarity, contributing well-documented commits and formatting improvements that support ongoing UI development and game logic stability.